package cn.smart.util;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.http.cookie.SM;

import java.util.List;

/**
 * @author Xiezh
 * @Description: 系统的标准json返回格式
 * @create 2017/7/30
 */
public class SmartResult {
    //定义jackson对象
    private static  final ObjectMapper MAPPER = new ObjectMapper();
    //相应业务状态
    private Integer status;
    //相应消息
    private String msg;
    //相应中的数据
    private Object data;
    public SmartResult(){

    }
    public SmartResult(Integer status,String msg,Object data){
        this.status = status;
        this.msg = msg;
        this.data = data;
    }
    public SmartResult(Object data){
        this.data = data;
        this.msg="OK";
        this.status = 200;
    }
    public static SmartResult build(Integer status,String msg,Object data){
        return  new SmartResult(status,msg,data);
    }
    public static  SmartResult ok(Object data){
        return  new SmartResult(data);
    }
    public static  SmartResult ok(){
        return new SmartResult(null);
    }
    public static ObjectMapper getMAPPER() {
        return MAPPER;
    }

    /**
     * 将json结果集转换成SmartResult对象
     * @param jsonData
     * @param clazz
     * @return
     */
    public  static SmartResult formatToPojo(String jsonData,Class<?> clazz){
        try{
            if (clazz == null) {
                return MAPPER.readValue(jsonData, SmartResult.class);
            }
            JsonNode jsonNode = MAPPER.readTree(jsonData);
            JsonNode data = jsonNode.get("data");
            Object obj = null;
            if(clazz!=null){
                if (data.isObject()) obj=MAPPER.readValues(data.traverse(),clazz);
                if(data.isTextual()) obj= MAPPER.readValue(data.asText(), clazz);
            }
            return SmartResult.build(jsonNode.get("status").intValue(),jsonNode.get("msg").asText(),obj);
        }catch (Exception e){
            return  null;
        }
    }

    /**
     * 没有object对象的转化
     *
     * @param json
     * @return
     */
    public static SmartResult format(String json) {
        try {
            return MAPPER.readValue(json, SmartResult.class);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * Object是集合转化
     *
     * @param jsonData json数据
     * @param clazz 集合中的类型
     * @return
     */
    public static SmartResult formatToList(String jsonData, Class<?> clazz) {
        try {
            JsonNode jsonNode = MAPPER.readTree(jsonData);
            JsonNode data = jsonNode.get("data");
            Object obj = null;
            if (data.isArray() && data.size() > 0) {
                obj = MAPPER.readValue(data.traverse(),
                        MAPPER.getTypeFactory().constructCollectionType(List.class, clazz));
            }
            return build(jsonNode.get("status").intValue(), jsonNode.get("msg").asText(), obj);
        } catch (Exception e) {
            return null;
        }
    }

    public Integer getStatus() {
        return status;
    }

    public void setStatus(Integer status) {
        this.status = status;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public Object getData() {
        return data;
    }

    public void setData(Object data) {
        this.data = data;
    }
}
